Fountain pen



June 24,1930. H. STEIN FOUNTAIN PEN Filed opt. 19. 1928 /NveNT'aQ Patented June 24, i930',

UNITED srnres PATENT erster HUGO, STEIN, F VIENNA, AUSTRIA FOUNTAIN PEN Application led October 19, 1928, Serial No. 813,609,l and in Austria December S, 192?.

This invention relates to self-lilling fountain pens and it refers particularly to pens having an ink reservoir formed of an elastic material, for example, rubber, which is capable of being twisted in either direction Vfrom the position of rest for the purpose of filling the pen and then resumes its normal position.

According to this invention means are provided to limit the number of turns of the member serving for twisting the reservoir in either direction. The shortenin of the axial length of the reservoir, cause by twisting it, is made use of for limiting the number ot turns. h

The appended drawing .shows by way of example two forms of the invention.

Fig. l is a View partly in section of the fountain pen with the elastic ink reservoir in its normal position.

Fig. 2 is a View partly in section of the fountain pen with the ink reservoir twisted.

Fig. 3 is a View partly in section of a y modification.

According to Fig. l the ink reservoir 2,

` which isv formed yof rubber, is disposed inside the outer shellor case l holding the plug 9 which carries the nib. .The reservoir is connectedat one end tothe plug and at the other end is closed lby a stopper 3.

A knob 5 is provided, which knob is rotatable in relatlon to the shell, but cannot otherwise be displaced. In a recess 6 in the knob 5 lies a-pin 4 which is connected firmly to the stopper 3. The recess- 6 and pin 4 are of square, polygonal or other unround cross sectional outline, so that the pin 4 can be movedv axially in relationl to the knob 5,

'but is carried round vby l'the latter when turned. The stopper 3 carries a projection 7 which can co-operate with a stop 8 fitted to the inner wall of the shell 2.

`To fill the reservoir 2 with ink it is twisted in one direction or the other, so that if it is turned to the right -for example it takes the position shown in Fig. ,2. If the knob 5 be turned the pin is carried round with it, thustwisting the elastic reservoir 2.

In the form of the invention shown this reservoir is rigidly connected only to the l (Fi 2). 0n the knob 5 being rotated still "urther the projection 7 is thrust against the stop 8, with the result that further twisting of the reservoir is-prevented.

The stops 7 and 8 co-operate equally well,

whether the reservoir be twisted in one direction or the other. If the pen is inserted into an ink well'or the like and the knob 5 released the reservoir 2 and the knob 5, return to the normal position shown in Fig. l under the action of the elastict of the salid reservoir which is thereby ll7 1n 'If the elastic reservoir 2 is made of good material, its life is sufficient for practical purposes. However it maybecome advisable to change the rubber tube constituting the elastic reservoir, in order to be able to use the fountain pen for a further time.

In the form of the pen in which the upper end of the reservoir is not firmly connected to the knob 5 the insertion of a new reservoir is made possible by connecting the plug 9 to the shell by means of a threaded connection. The thread provided for that purposeV on the inside of the shell 1 is has reached thel stop 8 provided upon the inside of the shell V marked 11. If the plug 9 be screwed out of the shell lthe shell l and the knob 5 are entirely disconnected fromthe other parts of the fountain pen, and this shell, together protectlve capf5 which has no connection Y with the'pin 4. After removing the cap 5 the pin 4 1s free for being operated by the user. As it will be seen rom the drawing the in may be rotated in both directions as in the case of the constructional form described above but may also be solely pressed downwardly without being turned. Thus it is in the will of the user whether he will fill the reservoir 2 by turning the pin i or by pressing down the same like a press-button. In some cases the stops 7 and 8 shown may be dispensed with.

What I claim is: 1. In a fountain pen, an ink reservoir u capable of being twisted, a member movab e in both directions from the position of rest and operably connected with said reservoir to twist the same, and means for limiting the numberof turns in either di- ,o rection of said movable member.

2. In a. fountain pen, a barrel, a flexible reservoir within said barrel, a cap-like member rotatably mounted on the outer end of the barrel and operably connected with the 35 reservoir and rotatable in either direction for twisting the reservoir, and means for limiting the number of turns in either direction of the said cap member, said means comprising a part connected with the reser- 30 voir and a part connected with the barrel.

3. A fountain pen in accordance with claim 2, wherein the part on the inner wall of the barrel is in the form of a stop while the part on the reservoir which cooperates 35 with the stop is in the form of a projection which follows the contracting movement of the elastic reservoir when the latter is being twisted and after a definite number of turns in the one or other direca tions comes to rest against said stop and thereby prevents furt er twisting of the reservoir.

4. A fountain pen in accordance with claim 2 wherein the cap is provided with a 5 recess substantiall rectangular-shaped in cro section whic opens towards the interior of the barrel, and a plug of substantially similar shape carried by the ad'acent end of the reservoir and slidably an non- 50 rotatably mounted in said recess, substantially as and for the purposes set forth.

'Intestimony whereof I aix my signature.

HUGO STEIN. 

